katsudon

Katsudon (カツ丼) is short for "tonkatsudonburi" (豚カツ丼),
which means "pigcutletbowl". And that's what it is,
a deep-fried cutlet of pork (tonkatsu) on a bowl of rice, but with some
egg and onion on top to give some flavor to the rice. Not exactly
health food, katsudon is probably popular precisely because
it has the caloric content to keep you going. Here's a
guide to assembling your own (4 servings):